Punching-machine.



I. sANDsTIIoII/I.

PUNCHING MACHINE., APPLICATION FILED JULY I9. I9Is.

1 ,245,388. Patented Nov. 6, 1917.

JOHN SANDSTROM, OF ADAMS, NORTH DAKOTA.

PUNCHING-MA CHINE.

Specification of Letters Patent.

Patented Nov. 6, 1917.

Application led July 19, 1916. Serial No. 110,0872. Y

To aZZ whom it 'may concern: Y

Be it known th-at I, Jol-1N SANDsTRoM, a citizen of the United States,vresiding at Adams, in the county of Walsh and State of North Dakota,have invented certain new and useful Improvements in Punching-Machines;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appe'rtains to make and use the same.

My invention relates to punching machines, especially adapted forpunching holes in relatively soft substances, such as leather; and, tothis end, generally stated, the invention consists of the novel .devicesand combinations of devices hereinafter described and defined* in theclaim.

In the accompanying` drawings, which illustrate the invention, likecharacters indicate like parts throughout the several views.

Referring to the drawings,

Figure 1 is a side elevation' of the inven' Fig. 2 is a plan view of thesame withthe end portion of a strap, indicated by means of broken lines.positioned to be punched;

lfig. 3 is a view principally in front end elevation with some partsshown in section; Fig. 4 is a longitudinal central section taken on theline 4-4 of Fig. 2; and

Fig. 5 is a transverse section taken on the line w of Fig. 4.

rl`he numeral 1 indicates a base plate adapted to be screwed orotherwise rigidly secured to a suitable support, such as a table orbench. A pair of horizontally spaced bars 2 is rigidly bolted to therear end portion of the base plate 1 and their forward ends are extendedupward and then forward to afford a pair of. arms 3, which are locatedabove and parallel to the base plate 1 and have formedin their free endshorizontally alined bearings 4. Integrally formed with the rear ends ofthe bars 2, is a pair of vertically projecting bearing lugs 5 in whichis mounted a horizontal pivot bolt 6.

The rear end of a forwardly projecting horizontally disposed lever 7 ispivoted on the bolt 6 for vertical swinging movement between the arms 3.The forward end of the lever 7 terminates slightly forward of the arms3. On the free end of the lever 7, is a turret 8 to which is detachablysecured several (as shown, four) radially stantially flushed therewith.

projecting tubular punches 9, of different sizes, ythe inner ends ofwhich open @into a discharge recess 10 formed in the face of saidturret. back of the turret 8, is a hub 11 which bears directly againstthe free end of the :lever 7 and is lprovided with an axial bore,through which is extended aheaded bolt 12. This b olt 1:2 is co-axialwith the longitudinal axis of the lever 77 has screw-threaded engagementtherewith and its headv is located within the recess 10 and holds theturret against removal from the lever 7, but with freedom for rotarymovement on the longitudinal axis ofthe lever 7. Y

The. .punches 9 are of well known form and have screw-threadedengagement with punches 9 may be moved successively into operative ordownwardly projecting positions, for cooperation with an anvil 13 ofcopper or other suitable material set into the base plate 1 with itsupper facesub'- The turret 8 is held in predetermined set positions by aspring latch 14 secured to the under side of the lever 7 and has on itsfree end a detent 15, arranged to enter any one of fourcircumferentially spaced notches 16 formed in the collar 11. Thesenotches 16 are arranged to properly position and hold a selected punchfor action on the anvil 13.

The lever 7 is oscillated to and from an operative position by a crank17 journaled in the bearings 3. A hand lever 18 is provided foroperating the crank 17 and is secured, as shown, to the right hand endthereof, outward of the adjacent bearing 4. |The transverse portion ofthe crank 17 bears upon the upper face of the lever 7, just back of theturret 8, and on an overlying flat linger 19 rigidly secured to theupper face of the lever 7. During the downward movement of the lever 7the crank 17 bears directly on the lever .7 and during the uppermovement thereof, said crank directly engages the finger 19.

A gage 20, which extends transversely of the base plate 1 for slidingmovement thereon toward and from the anvil 13, is provided for properlypositioning a piece of material to be punched. As indicated by brokenlines in Fig. 2, a strap Z is supported on the base plate 1 and properlypositioned over the anvil 13 by the gage Q0. The ends of the gage 2O arebent downlntegrally formed with the wardly and inwardly to engage thebeveled longitudinal edges of the base plate 1 for holding the gageagainst lifting movement therefrom, but with freedom for slidingmovement thereon. The gage 20 is held in different set positions, withrespect to a p0- sitioned punch 9, by a thumb nut-equipped stud 21anchored to and projecting above the base plate 1. This stud 21 extendsthrough a slot 22 formed in a rearwardly projecting extension 23 on thegage 2O and the head thereof bears directly against the gage extension23 and frictionally clamps the same onto the base plate 1.

A pair of horizontally proj ecting stripper fingers Q4 is provided forremoving the strap Z from a positioned punch 9, after the same has beenpunched and during the lifting movement of the lever 7 These stripperlingers 21 are rigidly secured, one to each of the arms 3, projecthorizontally between the turret head 8 and base plate 1 and are edgewisespaced to permit the positioned punch 8 to work therebetween, during itsmovement to and from an operative position.

By means of the hand lever 18, the crank 17 may be moved from one sideto the other of the vertical dead center. When the lever 7 is raised,the crank 17 is rearward of a vertical dead center and the turret head 8cannot be pressed downward, as the hand lever 18 Vwill engage the thumbnut-equipped stud 21 which acts as a stop. Obviously, by

. drawing aside the latch 14 and rotating the turret head 8, any one ofthe different sized punches 9 may be brought into an operative position.Thepunches 9 can only be set in different positions when the turret head8 is raised, for the reason that the stripper fingers 2i will interferewith the movement thereof when said turret head is in a low eredposition.

What I claim is :w

The combination with ka base having an anvil and a pair of arms, of avertically movable lever pivoted to the base and havingon its free end apunch for cooperation with said anvil, a shaft journaled in the freeends of said arms and having a crank Copies of this patent may beobtained for five cents each, b`y addressing the Commissioner ofPatents, Washington, D. C.

